Genetic Variant NBN:c.1398-10delT (chr8-89953700-TA-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP6_Moderate

The NM_002485.5(NBN):c.1398-10delT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000169 in 1,578,636 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00018 ( 0 hom. )

Consequence

NBN
NM_002485.5 intron

Scores

Not classified

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 1.25

Publications

1 publications found

Variant links:

Genes affected

NBN (HGNC:7652): (nibrin) Mutations in this gene are associated with Nijmegen breakage syndrome, an autosomal recessive chromosomal instability syndrome characterized by microcephaly, growth retardation, immunodeficiency, and cancer predisposition. The encoded protein is a member of the MRE11/RAD50 double-strand break repair complex which consists of 5 proteins. This gene product is thought to be involved in DNA double-strand break repair and DNA damage-induced checkpoint activation. [provided by RefSeq, Jul 2008]

NBN Gene-Disease associations (from GenCC):

Nijmegen breakage syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen, Myriad Women’s Health
rhabdomyosarcoma
Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
idiopathic aplastic anemia
Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
prostate cancer
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
hereditary breast carcinoma
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

NBN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP6

Variant 8-89953700-TA-T is Benign according to our data. Variant chr8-89953700-TA-T is described in ClinVar as Likely_benign. ClinVar VariationId is 530780.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NBN	NM_002485.5 link	c.1398-10delT		intron_variant	Intron 10 of 15	ENST00000265433.8	NP_002476.2	O60934

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NBN	ENST00000265433.8 link	c.1398-10delT		intron_variant	Intron 10 of 15	1	NM_002485.5	ENSP00000265433.4		O60934

Frequencies

GnomAD3 genomes

AF:

0.0000265

AC:

AN:

150902

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000662

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000209

Gnomad FIN

AF:

0.000193

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000603

AC:

123

AN:

203826

AF XY:

0.000667

show subpopulations

Gnomad AFR exome

AF:

0.000155

Gnomad AMR exome

AF:

0.000459

Gnomad ASJ exome

AF:

0.000114

Gnomad EAS exome

AF:

0.000320

Gnomad FIN exome

AF:

0.00135

Gnomad NFE exome

AF:

0.000540

Gnomad OTH exome

AF:

0.000402

GnomAD4 exome

AF:

0.000184

AC:

263

AN:

1427734

Hom.:

Cov.:

AF XY:

0.000189

AC XY:

134

AN XY:

710342

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.000246

AC:

AN:

32504

American (AMR)

AF:

0.000446

AC:

AN:

42576

Ashkenazi Jewish (ASJ)

AF:

0.0000392

AC:

AN:

25506

East Asian (EAS)

AF:

0.0000255

AC:

AN:

39154

South Asian (SAS)

AF:

0.000347

AC:

AN:

83672

European-Finnish (FIN)

AF:

0.000750

AC:

AN:

49332

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5320

European-Non Finnish (NFE)

AF:

0.000149

AC:

163

AN:

1090680

Other (OTH)

AF:

0.0000848

AC:

AN:

58990

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.262

Heterozygous variant carriers

118

158

197

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000265

AC:

AN:

150902

Hom.:

Cov.:

AF XY:

0.0000272

AC XY:

AN XY:

73638

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41112

American (AMR)

AF:

0.0000662

AC:

AN:

15108

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3450

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.000209

AC:

AN:

4790

European-Finnish (FIN)

AF:

0.000193

AC:

AN:

10336

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67628

Other (OTH)

AF:

0.00

AC:

AN:

2072

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00170

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Microcephaly, normal intelligence and immunodeficiency

Benign:1

Apr 16, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

1.3

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

8-89953700-TAAAA-TAAA

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over